I'm not surprised. This age group, mostly whites, have been most affected by the massive increases of imported visa workers.
1999 was the year the H1B visa cap was increased from 63,000 to 193,000 (with cap exemptions for visa workers being hired by government, academia, and government contractors; meaning those were not counted). The official cap was lowered after three years, but the numbers kept increasing. Other types of visas were also expanded, such that during those years, 140,000 visa workers per month, 1.68 Million visa workers per year, were coming into the USA to displace American citizens from their jobs.
In that 15 years, 25.2 Million visa workers of all types were imported to displace that many American citizens in all sectors of the economy.
Like many of us have said, importing visa workers is a form of genocide.